(-215:Assertion failed) total(srcShape, srcRange.start, srcRange.end) == maskTotal in function 'cv::dnn::computeShapeByReshapeMask'

[crackwitz]

googling for “computeShapeByReshapeMask” gave me these results:

• OpenCV DNN failing to load an ONNX file: computeShapeByReshapeMask issue · Issue #23365 · opencv/opencv · GitHub
• OpenCV does not support ONNX models with dynamic input/output shape · Issue #18072 · opencv/opencv · GitHub
• Error in function computeShapeByReshapeMask, when loading official ONNX model (mask-rcnn) · Issue #17914 · opencv/opencv · GitHub